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  #1  
Old 22-04-08, 06:27 AM
JMP JMP is offline
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LP12 Basik power supply

Hello,
I'm looking for the diagram of the Linn Basik power supply.

Somebody here shall have this?

Thank you very much
Jean-Marc
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  #2  
Old 22-04-08, 06:48 AM
Dowser Dowser is offline
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Three caps and a resistor I believe - check my thread in Classic on renovating a 30 year old LP12 for piccies.

Richard
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  #3  
Old 22-04-08, 07:12 AM
JMP JMP is offline
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Richard,

Saw the pics, thanks. Seems very simple!

Is it possible to have the values of the components and a diagram (back engineered from the PCB)?

Thank you
JM
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  #4  
Old 22-04-08, 08:16 AM
stevec67 stevec67 is offline
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It *is* very simple. The Armageddon is equally simple, once the transformer is taken into account. You only need a capacitor to supply the field coils with mains 90 deg out of phase and the motor will run. The resistor just limits the current, and you're in. Oh, the joys of synchronous motors.
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  #5  
Old 22-04-08, 08:25 AM
martin clark martin clark is offline
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The resistor doesn't actually limit the current - the high inductance and resistance of the motor does that (c. 4.7- 5H and around 10Kohm total impedance at 50Hz). These motor values dominate in calculating suitable R, C values.

So the resistor just drops the voltage appearing across the motor. Bigger resistor = lower voltage = less vibration, limited only by needing enough volts to make the turntable actually start-up.

For values, try R=4700ohms to 6800ohms, C=0.2uF. You'll see C=0.22 in many circuits, but two 0.1uF caps in parallel gives a more accurate 90degree phaseshift for the Linn motor on 50Hz mains.

As Steve says, the Armageddon only adds an isolation transformer to the basik(sic) idea.

Don't overlook RichardH's excellent article in the Reference room:
http://www.pinkfishmedia.net/forum/s...ad.php?t=22291
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  #6  
Old 23-04-08, 02:11 AM
JMP JMP is offline
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Thank you!
JM
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  #7  
Old 23-04-08, 02:22 AM
Darran.H Darran.H is offline
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Quote:
Originally Posted by JMP View Post
Hello,
I'm looking for the diagram of the Linn Basik power supply.

Somebody here shall have this?

Thank you very much
Jean-Marc
I have a couple of the basik power supplies if you are looking for one p.m. me.
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  #8  
Old 23-04-08, 08:12 AM
337alant 337alant is offline
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You can also get the 1973 wiring diag from the vinyl engine site
http://www.vinylengine.com/library/l...2-sondek.shtml
I was going to build one based on that diag so I can try out my old flutter buster.
Martin your suggestion seems much simpler could you post a diag with suggested best componants to use
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  #9  
Old 23-04-08, 08:20 AM
stevec67 stevec67 is offline
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There's something in the reference section on DIY Geddon, and a load of useful stuff on Neil, erm, whatsizname's site.
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  #10  
Old 23-04-08, 08:33 AM
flatpopely flatpopely is offline
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You mean:-

http://www.neilmcbride.co.uk/ttpsu.html

P.S. posted the bits today.
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  #11  
Old 23-04-08, 08:50 AM
neiljadman neiljadman is offline
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Kind of on & off the subject - does anyone have a spare used but serviceable 60hHz motor available?
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